1 tab. 5 ref. Sum. (En)

Presentado también en: Segundo Simposio sobre Avances en la Producción de Semillas Forestales en América Latina, Santo Domingo, R.D., 18-22 Oct. 1999.

The performance of progenies of Swietenia macrophylla in Costa Rica was evaluated through trials established in the north of the country, Alajuela province. The trials Upala and Lagartera contain progenies of Costa Rica and the Laberinto trial contains material from six Central American countries and Mexico. Root collar diameter, height, survival, and attack of Hypsipyla grandella were collected. Analysis of variance for those variables was made, resulting in highly significative differences on height and diameter but not for attack of Hypsipyla. Heretabilities at 621 days for Upala were 0.54¦ 0.02, 0.55 ¦ 0.02 y 0.07 ¦ 0.002 for diameter, height and attack respectively. Laberinto at 251 days presented heretabilities for diameter, height and attack of 0.55 ¦ 0.008; 0.59 ¦ .008 y 0.02 ¦ 0.0006 respectively. CVAG were 12.8 for diameter and 13.76 for height. Trial Lagartera was analyzed at 585 days and heretabilities of the 0.09 ¦ 0.005; 0.16 ¦ 0.008 y 0.12 ¦ 0.005 for diameter, height and attack, low values in this trial were caused by environmental error caused by flooding. Areas of conservation for the species are mentioned in the different countries and activities for management of the species are considered.